# Array and Matrix Mathematics

You can perform several mathematical operations on arrays and matrices using System objects and blocks in the DSP System Toolbox™. These operations include simple operations such as addition, subtraction, multiplication, and division, and more complex operations such as cumulative sum, cumulative product, and normalization. You can also extract diagonals and upper and lower triangles from matrices. In addition, there are DSP System Toolbox blocks that perform polynomial fitting in a least-squares sense, evaluate polynomial expressions, and determine if the roots of a polynomial are inside the unit circle.

## Blocks

## Topics

**Compute Difference of a Matrix**Simulink

^{®}model example that shows how to calculate the rowwise and columnwise difference of a matrix.**Compute Maximum Column Sum of Matrix**Simulink model example that shows how to calculate the max column sum of a matrix.

**Compute Matrix Exponential**Use the Matrix Exponential block to compute the matrix exponential of a square matrix.

**Variable-Size Signal Support DSP System Objects**List of System objects that support variable-sized signals in DSP System Toolbox.